«وَكَيْفَ يَقْرِي مَنْ نُفِيَ عَنْهُ الْكَرَى»
How can someone offer hospitality when sleep itself has been driven from him?
Yaqrī means to host or feed a guest; karā means sleep. The similar sounds of qirā / karā, with a different initial consonant, express distinct ideas.
The youth explains his incapacity with restraint. The rhetorical value lies not only in sound play but in turning his own deprivation into a dignified explanation.